Sofia Vergara and Nick Loeb in Mexico

Sofia Vergara's gigantic engagement ring is stealing the buzz, while her representative has denied the engagement to her businessman boyfriend Nick Loeb.

Colombian actress Sofia Vergara flaunted her curvy figure in a black dress that revealed some extra skin, while flashing a huge diamond ring on her ring finger.

The Modern Family actress was "'bouncing around and showing everyone the ring," a source told E! News.

The couple celebrated Vergara's 40th birthday on Tuesday at a beachside bash at the Rosewood Mayakoba resort in Mexico with nearly a hundred close family and friends.

The romance between Vergara and Loeb have been going on and off, and now it seems to be on again. The lovebirds were seen partying and sightseeing together, very much in love.

"They were very cute together," a source tells E! News.
"He was incredibly attentive to her and was focusing his attention on her for most of the night."

And yet the engagement itself was denied.
Loeb popped up the question, but Vergara haven't said yes, according to an E! News source.

"As of today, Sofia is not engaged," a Mexico-based rep said, according to Peopleenespanol.com.

The couple's ambiguous status is no surprise, as they got back together just last month after their split in May. Sofia and Nick first met in 2010, and have been on and off since then.

"They have a crazy relationship. They break up and make up. They fight and make up hard!' an insider told Us Weekly.

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